/Engine/Source/Editor/PIEPreviewDeviceProfileSelector/Public/PIEPreviewDeviceProfileSelectorModule.h
We need the game layer manager to control the DPI scaling behavior and this function can be called should be called when the manager is available
virtual void SetGameLayerManagerWidget ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< class [SGameLayerManager](API\Runtime\Engine\Slate\SGameLayerManager) > GameLayerManager )